LibJS/Bytecode: Reorder Call instruction members to make it smaller

Author: https://github.com/awesomekling
Commit: b99f0a7e22
Pull-request: https://github.com/SerenityOS/serenity/pull/24276
Reviewed-by: https://github.com/Hendiadyoin1
Reviewed-by: https://github.com/shannonbooth

Userland/Libraries/LibJS/Bytecode/Builtins.h

@@ -22,7 +22,7 @@ namespace JS::Bytecode {
     O(MathRound, math_round, Math, round, 1) \
     O(MathSqrt, math_sqrt, Math, sqrt, 1)
 
-enum class Builtin {
+enum class Builtin : u8 {
 #define DEFINE_BUILTIN_ENUM(name, ...) name,
     JS_ENUMERATE_BUILTINS(DEFINE_BUILTIN_ENUM)
 #undef DEFINE_BUILTIN_ENUM

Userland/Libraries/LibJS/Bytecode/Op.h

@@ -1263,7 +1263,7 @@ private:
     Label m_false_target;
 };
 
-enum class CallType {
+enum class CallType : u8 {
     Call,
     Construct,
     DirectEval,
@@ -1280,8 +1280,8 @@ public:
         , m_this_value(this_value)
         , m_argument_count(arguments.size())
         , m_type(type)
-        , m_expression_string(expression_string)
         , m_builtin(builtin)
+        , m_expression_string(expression_string)
     {
         for (size_t i = 0; i < arguments.size(); ++i)
             m_arguments[i] = arguments[i];
@@ -1311,8 +1311,8 @@ private:
     Operand m_this_value;
     u32 m_argument_count { 0 };
     CallType m_type;
-    Optional<StringTableIndex> m_expression_string;
     Optional<Builtin> m_builtin;
+    Optional<StringTableIndex> m_expression_string;
     Operand m_arguments[];
 };